Make GetURLForDebugging return a const GURL

webkit/glue/media/simple_data_source.h

 // Copyright (c) 2009 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // An extremely simple implementation of DataSource that downloads the entire
 // media resource into memory before signaling that initialization has finished.
 // Primarily used to test <audio> and <video> with buffering/caching removed
 // from the equation.
 
 #ifndef WEBKIT_GLUE_MEDIA_SIMPLE_DATA_SOURCE_H_
@@ skipping 44 matching lines @@
   virtual void OnUploadProgress(uint64 position, uint64 size);
   virtual bool OnReceivedRedirect(
       const GURL& new_url,
       const webkit_glue::ResourceLoaderBridge::ResponseInfo& info);
   virtual void OnReceivedResponse(
       const webkit_glue::ResourceLoaderBridge::ResponseInfo& info,
       bool content_filtered);
   virtual void OnReceivedData(const char* data, int len);
   virtual void OnCompletedRequest(const URLRequestStatus& status,
                                   const std::string& security_info);
-  virtual std::string GetURLForDebugging();
+  virtual GURL GetURLForDebugging() const;
 
  private:
   friend class media::FilterFactoryImpl2<
       SimpleDataSource,
       MessageLoop*,
       webkit_glue::MediaResourceLoaderBridgeFactory*>;
   SimpleDataSource(
       MessageLoop* render_loop,
       webkit_glue::MediaResourceLoaderBridgeFactory* bridge_factory);
   virtual ~SimpleDataSource();
@@ skipping 38 matching lines @@
 
   // Filter callbacks.
   scoped_ptr<media::FilterCallback> initialize_callback_;
 
   DISALLOW_COPY_AND_ASSIGN(SimpleDataSource);
 };
 
 }  // namespace webkit_glue
 
 #endif  // WEBKIT_GLUE_MEDIA_SIMPLE_DATA_SOURCE_H_